Suspension means for tube frames



Patented Mai. 15, 1927.r

UNITED STATES PATENrlorries@-:

EDGAR E. HATHAWAY, 0E WELLESLEY, MAssAciErsErTs, AssrGNon'fro SHAW'MUT ENGINEERING COMPANY, or Bos'roNMAssAoHusErrs, A coRPoRArIoN oEiviAsf seonesET'rs.

sUsrENsIoN MEANs Eon TUBE FRAMES.

1 Applicatimi filed September 28, 1922. Serial No. 591,159.

This invention relates to tube frames such as are used in weaving `tufted fabrics hke Axminster carpets and is intended to provide an efficient4 and thoroughly reliable suspension means of simple `and linexpenslve` vconstruction lfor detachably suspending the tube frame from itsjcarrier chains which support and carry it Vinto positionzforteinporary Y ing the tufts to, thev fabric. being woven. e In my' co-pending application Serial No.

. 541,336, Patentino, 1,469,180, 'I disclosed a;

suspension means comprisingrpivotally related 'rigid-.or nonflexiblearmsforming a pair of (zo-operating Vsuspension, members ,Y consideration.

The present invention aims to overcome this kdrawback by providing sus ension.

means so constructed and arrange as to permit the parts being made of pressed steel` or die-formed material so constructed and arranged as to permitassemblagefor use withoutthe-necessity ofresorting to expen-` sive machiningofthe parts; To this end I have so formedthe suspension members in the stamping or punching operation that they are adapted to mutually. interlock, with.

their interlocking portions heldV in operative relationship merely. by the insertion of Ya fulcral in which may be kept-in fixed po- Sition` y the thrust. Vof the compression spring exerted upon theV parts, The seating of the compression rspring in asocket member, vwhich is utilized also-to secure-thetubeattaching car or bracket tothe main suspension-member, forms another feature lof, the invention. i

vThese vand otherfeatures of the invention willbe particularlyk described in the following specification' and will be defined in the 'claims annexed. Y

In the :accompanying drawingsS I have illustrated a preferred form embodying the principles of Athis invention, in which:V

Y Figure` 1 is an end elevation of the suspension means. 1

transfer for the operation of deliver-V considerable expense to manufacture.,A

Figure 2 is a side elevation thereof.

a plane Vparallel to that of'Figure 2.A

Figure 4 is an elevationy showin the in! side face of .the hanger withY the lower.-v looped` end of the hookarm projectingin- .wardly through a recess 'in the Vhanger arm.4

icati'on of the tube-attaching bracket(V Inv'the practice of the invention, accorder.; Aingto the illustration. inthe drawings,iI

`providea mainsuspension member l, made of sufficiently heavy stock to belpractically Figure 6 is adetail in elevation of a ,modirigid or non-iiexiblefin service.V This main suspension member 1,v is vformed with an rip-,.- ward projection 2, which1 is perforated to rece-ive the'journal of the yarn spool rc intherefor. The extreme upper part of the main suspension member l., is outwardly offset and projects upward to ,form a' `pene ltratimqiinger or extension 3, adapted to 'pass Vbetweenrthe links anofy thesupporting cardicated in Vdotted lines to form abearing rier chain and tojbe ,detachablyvconnected thereto by the hooked portion 7, off-'the co-V operating pivotal suspension member 6.

The inainlsus ension arm 1, Vhas its lowerf 4end bent at su stantially right angles to the upper portion to form an ear or lug 4 .adapted Vto pass inside the `hollow end of thecarrierbar b shown'in dotted lines in Figure 2,4 which supports the individual tuft tubes, also indicated 'in' dotted :lines in said Figure 3. At or adjacent to the right angle bend at the lower end ofthe suspen-4 sion member l, is formed anv aperture 5, of a sizeto receive the curledend 8,ofthe pivotal suspension member 6, sothat said vcurled-over end 8,-forms .a bearing which,"y

after insertion through ythe aperturef, is`

Yadapted vto receive a fulcral pin'12, which is driven into it. inside the V'plane 'of the in-l ner face ofthe suspension arm 1.

To serve as a companion member tothe tube-attaching portion 4,'.there is providedy .a tube-attaching bracket 9, whose outer end yis bent at right angles to form a depending or vertical arm l0, the middle portioniof lwhose lower end is notchedor punched out to provide short extensions 11, which extend farvenough downward to engage the oppositev ends of thev fulcral pin l2, to -hold'it against vertical movement and which extensions 11, also engage the side edges of the curled bearing portion 8, of the pivotal arm 6, so as to aid in preventing a lateral or axial play thereof. The aperture 5, and the corresponding notch in the tube-attaching bracket 10, may be so proportioned as to form a fairly close engagement with the exterior circular portion of the bearing eye or loop 8, to afford additional means of preventing vertical movement of the fulcral It will be understood that, as in my earlier above-mentioned application, the pivotal suspension member 6, is made of practically rigid or inflexible material so far as concernsv the strains'of actual service, and-is normally thrust outward by mea-ns of a suitable spring such as the helical spring 15, seated in the socket member 13 and abutting against the inside face of the arm 6, which latter maybe provided with an upset boss 16, to serve as a guide to keep the adjacent end of the spring centralized.

Since the fulcral or supporting pin 12 which forms the axis of movement of the hook arm 6 lies inside the end of the tubular carrier barb when the parts are assembled it will be seen that the carrier bar itself acts, through its opposite side walls, to prevent endwise displacement or removal of the axial pin. `The parts are assembled as shown in Figures 2 kand 6 before the barattaching portion of the hanger is inserted within the tubular-carrier bar. The bearing eye or hook 12 of the pivotal `arm and its axis are therefore, by such interior location, protected against injury or displacement and yet theparts can be easily disassembled by removing the fastening screws attaching the arms 4 and 9 with the carrier bar.

The socket member 13,'has its outer end somewhat reduced to pass through registering apertures in the parts-1 and 10, and adapted to be headed up from the outside so that it forms in effect a hollow rivet serving to lirmly imite tube-attaching bracket 9, with 'the suspension arm 1, and also serving as a socket for the thrust spring 15, by which the thrust'spring is securely heldin operative position. This permits the use of a` spiral-spring of substantial length thereby prolonging the life of the spring. The pivotal or hook member 6, is provided with aperture 6el in registry with the journal of the spool c so that the projecting end of the journal does not interfere with the full inward movement of the hook member.

As shown in F ig. 6 the main arm or member 1f? may be struck up to form a transverse recess 20 which serves as a transverse bearing recess or socket for the reception of the fulcral pin12.

It will be observed by reference to Figures 1 and 3 of the drawings that the hook arm 6, has its upper portion perforated at 6a in line with the bearing aperture of theV bar, the other member being formed with a bearing leye so disposed as to project through an aperture in the first-mentioned member sufficiently to vallow insertion of a fulcral pin through said eye on the inner side of said lirst mentioned member, a fulcral pin inserted in said eye, and a spring engaging bothmembers to oppose yielding resistance to the opening'apart' yof their ,chain-engaging ends and acting to keep the fulcral pin seated in operative position.

2. Suspension means for a tuft tube frame embracing in combination, a pair of pivotally rela-ted chain-engaging suspension members, one of which is rigidly secured to the tube frame carrier bar, said members being pivotally and detachably interlocked by a fulcral pin extending through an eye formed on the pivotal member, and a'spring arranged to oppose a yielding resistance to the opening apart of the chain-engaging ends of the suspension members while also serving to maintain proper pivotal connection between the two suspension members, substantially as described.

3. Suspension means for a, tuft tube kframe embracing in combination coacting pivotally f related chain-engaging members one of which is rigidly secured to the tube frame carrier bar, `the other member being held by a pivotal connection with said rs't-mentioned member under spring tension, and a spring arranged to press the chain-engaging ends of said members .yieldingly t-ogether and acting also to maintain their pivotal connection against displacement, substantially as described.

4. Suspension means for a tuft tube frame" embracing in combination, a main suspension arm rigidly secured to the tube frame.

vsuspension arm and normally thrust into chain-retaining position by the thrust of said spring, substantially as described.

5. Suspension means'for a tuft tube Aframe embracing in combination, a main suspen-' sion arm secured to the carrier bar of the tube frame, a spring-containingv socket mem- Y scribed.

ber secured to said arm, a rigid chain-engaglng arm pivotally connected with said vfirst-mentioned arm, and a spring seated in said socket to normally force saidV chainengaging .arm into interlocking engagement vwiththe carrier chain from which the tube Jram'e is suspended, substantially as de# scribed.

6. Suspension means for a tuft tube frame embracing in combination, a main suspension arm provided with means for iirmly securing it to the carrier bar of the tube frame at its lower end and with a` bearing opening vat its .upper end to receive the journal of a yarn spool, a `non-flexible chain-engaging arm pivotally disposed in relation tofsaid main arm and provided with an 'aperture in line with the spool journalfto `allow saidpivotal arm full pivotal movement unobstructed by the projecting end oi said journal when the pivotal arm is movedback to chainfreleasing position, and a spring acting. to normally force said pivotal arm to chainretaining position, substantiallyV as de- 7. Suspension means for a tuft tube frame embracing in combination, a main suspension arm provided with means for supporting the yarn spool and the carrier bar of a tube frame, a chain-engaging arm provided with a chain-engaging hook at one-end and having its other end bent around to form a fulcral eye, a fulcral pin passed through said eye to engage the inner side of the main suspension arm and a spring interposed between the two arms so as to force both ends the bracket having partly registering'slots` a pivotal hook latch fulcrumed in said slots Vanda spring acting normally to press the hook end or" said latch intoy suspension engagement with a carrier chain.

9. In a loom, a pattern chain, a supportingy tube, a spool bearing bracket secured thereto, `a lsubstantially rigid chain-engaging hook pivotally mounted on said bracket and extending within the tube, and means to force said hook yieldingly outward.

10.' In a tuft tube frame for weaving, the combination of a tubular carrier bar, a suspension hanger rigidly secured to the end oul of the bar, saidv hanger being provided with an aperture 1opposite the open end of the bar, a hook having its lower end portion offset to be inserted through said aperture for pivotal connection with the bracket anda coiled spring seated inside the tubular carrier bar to force the hook yieldingly outf ward. In witness whereof, I have subscribed the above specification. I

` EDGAR F. HATHAWAY. 

